Who we are

Our Board

Mick Wilkes 011
Mick Wilkes

Independent Non-Executive Chair


Mick Wilkes is an experienced mining executive and company director with more than 35 years of broad international mining experience coupled with a successful track record of leading the development and operation of greenfield mines.

Most recently in his executive career, Mick was the President and CEO of dual listed (ASX and TSX) OceanaGold Corporation (ASX: OGC) from 2011 to 2020 where he led the transformation from a single asset junior company to a multinational mid-tier producer with four operations across three countries.

In previous roles he was the Executive General Manager of Operations at OZ Minerals responsible for the development of the Prominent Hill copper/gold project in South Australia and General Manager of the Sepon gold/copper project for Oxiana based in Laos.

Mick is currently a Non-Executive Chair of Kingston Resources Limited (ASX: KSN), Non-Executive Director of Genesis Minerals Limited (ASX: GMD), and a member of the Sustainable Minerals Institute’s Advisory Board at the University of Queensland. He was previously the Chair of the Governance Committee and a member of the Administration Committee of the World Gold Council.

Bob Katsiouleris 3
Bob Katsiouleris
CEO & Managing Director

Bob has over twenty five years of combined operational, engineering, and commercial experience in industrial minerals, and base metals, with an emphasis on improving profitability from mine to market.

Bob’s experience spans plant design and start-ups, new process and product development, and sales and marketing experience in mature and emerging markets for a wide range of minerals including zircon, rutile, borates, diatomite, silica, perlite, and more recently in zinc, lead, and associated by-products.

Bob has had success across bulk minerals and non-ferrous metals by always maintaining a focus on adding value via developing and implementing an industrial marketing model that creates uplift in a business by understanding the balance between mine to market, and market to mine.

Specialties: Industrial minerals, growth platforms, product development, and sales and marketing of non-commodity minerals, and commodity metals. Sales and marketing strategies, with a focus on the customer, product, and regional segmentation that improved profitability and created sustainable competitive advantage.

Melissa Holzberger 017
Melissa Holzberger
Non-Executive Director
Chair, Audit & Risk Committee
LLM Resources Law (Distinction) (Scotland), Dip. Int. Nuclear Law (Hons) (France), LLB (Adel), BA (Adel), GDLP, GAICD, FGIA

Melissa is an experienced Independent Non-Executive Director and mining lawyer with over 20 years’ experience in the international energy and resources sector.

Melissa brings a deep understanding of mining projects and operations having previously worked with BHP and Rio Tinto. Her substantial experience extends to highly regulated industries, international commodity trade, corporate ethics, risk and compliance oversight, together with a focus on environment, social and governance (ESG) matters.

Melissa is currently an Independent Non-Executive Director of Paladin Energy Ltd (ASX: PDN); and a member of the Federal Government’s Australian Radiation Protection and Nuclear Safety Agency’s Radiation Health and Safety Advisory Council.

Melissa holds a Master of Laws in Resources Law (Distinction) as a Chevening Scholar from the University of Dundee, Scotland; a Diploma in International Law (Hons) from the University of Montpellier, France; and a Bachelor of Laws and Bachelor of Arts from the University of Adelaide. In addition, she is a graduate of the University of Oxford’s Leading Sustainable Corporations; a graduate member of the Australian Institute of Company Directors; and a Fellow of the Governance Institute of Australia. In 2006, Ms Holzberger was awarded the Telstra South Australian Young Businesswoman of the Year which recognised her contributions and leadership in the energy, resources and business community.

Austen 1
Austen Perrin
Non-Executive Director
B. Econ. (Acc.), CA, GAICD

Austen Perrin is currently a Non-Executive Director with AJ Lucas Group Limited and up until recently a Non-Executive Director for Round Oak Minerals Pty Limited. Austen currently chairs the Audit and Risk Committee for AJ Lucas and previously for Round Oak Minerals Pty Limited.

Austen previously worked as a group CFO/Finance Director for large ASX/ NZX Companies for nearly 20 years. He previously held the group CFO roles for the AJ Lucas Group, Whitehaven Coal, Asciano, Pacific National and Toll NZ Limited.

Austen has had significant experience in developing capital management strategies and financing solutions to support corporate objectives including development of key infrastructure and transport projects and underground coal mines. He has a breadth of experience gained in a variety of industries including transport and logistics, ports, road and rail infrastructure, coal, copper and gold mining, unconventional shale gas, mining services, oil, gas and water pipeline construction, general building construction and insurance.

He has been a chartered accountant for over 33 years and is a graduate of the Australian Institute of Company Directors.